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6 RU SSPA Chassis Operations Manual
202058 REV AA
21
Note:
IP address, Gateway address, Subnet mask, IP port and IP Lock
address needs to be properly selected prior to first use (see
Appendix C
for details).
LED lamps on the connector indicate network status. A steady Green light indicates a
valid Ethernet link; a Yellow LED flashes during any data transfer activity (on both
Transmit and Receive paths).
2.1.2.10 Power Supply M&C (J12)
The DB9 connector is connected to the 1RU power supply chassis. The SSPA
monitors the status of the power supply chassis and alarms in the event of a power
supply module failure. Due to the nature of the N+1 redundant power supply, a failure
will not take the amplifier off the air.
2.1.2.11 Power Switch
The power switch is located near the top center of the rear panel, above the RF Output
port (J2).
2.2 Redundant Power Supply Chassis
Prime power is provided to the 6RU RM SSPA via a 1RU power supply chassis, which
is configured with a parallel set of four (4) 2,500 W modules. All of the modules are
active and share the load current supplied to the amplifier. The power supply module
current capacity is chosen such that at least one extra module is included over the
amplifier’s current requirement. This is to say that the power supply is n+1 redundant.
The amplifier will continue to operate normally in the presence of one power supply
module failure.
The power supply modules are all hot swappable from the front panel. Therefore, if
there ever is a power supply module failure, there is no need to remove the entire
power supply chassis. The failed module is simply removed via the front panel as
shown in
Figure 2-3
.
Figure 2-3: Removing Power Supply Module from Bay
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